The Square-1, invented by Karel Hršel and Vojtěch Kopský in 1990, is a shape-shifting cube puzzle that twists into complex forms. With 8 corners and 8 edges, it challenges solvers to restore its cubic shape and 6-color scheme. A WCA event, Max Siauw’s 3.63-second solve leads records. Its 552 billion combinations test skill. Rotate top/bottom layers in 30° increments and slice the middle to swap halves. Solve by shaping, then aligning pieces with algorithms like (1,0)/(0,1). QiYi’s magnetic versions excel. On rubikverse.com, the virtual simulator lets you master this dynamic puzzle anytime.